Wholly aromatic polyesters and preparation thereof
CA 1268589 C · Owner: Basf Aktiengesellschaft · Inventors: Hambrecht, Juergen; Portugall, Michael; Kock, Hans-Jakob
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
11 - O.Z. 0050/38133, Abstract of the Disclosure: Wholly aromatic polyesters which form a liquid-crystalline fiber-forming melt below 300°C and are composed of, a) from 10 to 25 mol % of repeat units of the formula I, I, b) from 5 to 15 mol % of repeat units of the formula II, II, c) from 5 to 15 mol % of repeat units of the formula III, III, d) not less than 10 mol % of repeat units of the formula IV, IV, and, e) a molar amount corresponding to the total amount of a), b) and c) of repeat units of the formula V V, the molar proportions of components a b, c, d and e add-, ing up to 100 mol% in each case the preparation thereof, and fibers, films moldings and surface coatings prepared …
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Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Granted May 1, 1990. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended May 1, 2007.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
Timeline From CIPO dates
Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.